memory/virtual.c

   1 /*
   2  * Win32 virtual memory functions
   3  *
   4  * Copyright 1997 Alexandre Julliard
   5  */
   6
   7 #include "config.h"
   8 #include "wine/port.h"
   9
  10 #include <assert.h>
  11 #include <errno.h>
  12 #ifdef HAVE_SYS_ERRNO_H
  13 #include <sys/errno.h>
  14 #endif
  15 #include <fcntl.h>
  16 #include <unistd.h>
  17 #include <stdlib.h>
  18 #include <stdio.h>
  19 #include <string.h>
  20 #include <sys/types.h>
  21 #ifdef HAVE_SYS_MMAN_H
  22 #include <sys/mman.h>
  23 #endif
  24 #include "winnls.h"
  25 #include "winbase.h"
  26 #include "wine/exception.h"
  27 #include "wine/unicode.h"
  28 #include "wine/library.h"
  29 #include "winerror.h"
  30 #include "file.h"
  31 #include "global.h"
  32 #include "wine/server.h"
  33 #include "debugtools.h"
  34
  35 DEFAULT_DEBUG_CHANNEL(virtual);
  36 DECLARE_DEBUG_CHANNEL(module);
  37
  38 #ifndef MS_SYNC
  39 #define MS_SYNC 0
  40 #endif
  41
  42 /* File view */
  43 typedef struct _FV
  44 {
  45     struct _FV   *next;        /* Next view */
  46     struct _FV   *prev;        /* Prev view */
  47     void         *base;        /* Base address */
  48     UINT          size;        /* Size in bytes */
  49     UINT          flags;       /* Allocation flags */
  50     HANDLE        mapping;     /* Handle to the file mapping */
  51     HANDLERPROC   handlerProc; /* Fault handler */
  52     LPVOID        handlerArg;  /* Fault handler argument */
  53     BYTE          protect;     /* Protection for all pages at allocation time */
  54     BYTE          prot[1];     /* Protection byte for each page */
  55 } FILE_VIEW;
  56
  57 /* Per-view flags */
  58 #define VFLAG_SYSTEM     0x01
  59 #define VFLAG_VALLOC     0x02  /* allocated by VirtualAlloc */
  60
  61 /* Conversion from VPROT_* to Win32 flags */
  62 static const BYTE VIRTUAL_Win32Flags[16] =
  63 {
  64     PAGE_NOACCESS,              /* 0 */
  65     PAGE_READONLY,              /* READ */
  66     PAGE_READWRITE,             /* WRITE */
  67     PAGE_READWRITE,             /* READ | WRITE */
  68     PAGE_EXECUTE,               /* EXEC */
  69     PAGE_EXECUTE_READ,          /* READ | EXEC */
  70     PAGE_EXECUTE_READWRITE,     /* WRITE | EXEC */
  71     PAGE_EXECUTE_READWRITE,     /* READ | WRITE | EXEC */
  72     PAGE_WRITECOPY,             /* WRITECOPY */
  73     PAGE_WRITECOPY,             /* READ | WRITECOPY */
  74     PAGE_WRITECOPY,             /* WRITE | WRITECOPY */
  75     PAGE_WRITECOPY,             /* READ | WRITE | WRITECOPY */
  76     PAGE_EXECUTE_WRITECOPY,     /* EXEC | WRITECOPY */
  77     PAGE_EXECUTE_WRITECOPY,     /* READ | EXEC | WRITECOPY */
  78     PAGE_EXECUTE_WRITECOPY,     /* WRITE | EXEC | WRITECOPY */
  79     PAGE_EXECUTE_WRITECOPY      /* READ | WRITE | EXEC | WRITECOPY */
  80 };
  81
  82
  83 static FILE_VIEW *VIRTUAL_FirstView;
  84 static CRITICAL_SECTION csVirtual = CRITICAL_SECTION_INIT("csVirtual");
  85
  86 #ifdef __i386__
  87 /* These are always the same on an i386, and it will be faster this way */
  88 # define page_mask  0xfff
  89 # define page_shift 12
  90 # define page_size  0x1000
  91 #else
  92 static UINT page_shift;
  93 static UINT page_mask;
  94 static UINT page_size;
  95 #endif  /* __i386__ */
  96 #define granularity_mask 0xffff  /* Allocation granularity (usually 64k) */
  97
  98 #define ROUND_ADDR(addr,mask) \
  99    ((void *)((UINT_PTR)(addr) & ~(mask)))
 100
 101 #define ROUND_SIZE(addr,size) \
 102    (((UINT)(size) + ((UINT_PTR)(addr) & page_mask) + page_mask) & ~page_mask)
 103
 104 #define VIRTUAL_DEBUG_DUMP_VIEW(view) \
 105    if (!TRACE_ON(virtual)); else VIRTUAL_DumpView(view)
 106
 107 static LPVOID VIRTUAL_mmap( int fd, LPVOID start, DWORD size, DWORD offset_low,
 108                             DWORD offset_high, int prot, int flags, BOOL *removable );
 109
 110 /* filter for page-fault exceptions */
 111 static WINE_EXCEPTION_FILTER(page_fault)
 112 {
 113     if (GetExceptionCode() == EXCEPTION_ACCESS_VIOLATION)
 114         return EXCEPTION_EXECUTE_HANDLER;
 115     return EXCEPTION_CONTINUE_SEARCH;
 116 }
 117
 118 /***********************************************************************
 119  *           VIRTUAL_GetProtStr
 120  */
 121 static const char *VIRTUAL_GetProtStr( BYTE prot )
 122 {
 123     static char buffer[6];
 124     buffer[0] = (prot & VPROT_COMMITTED) ? 'c' : '-';
 125     buffer[1] = (prot & VPROT_GUARD) ? 'g' : '-';
 126     buffer[2] = (prot & VPROT_READ) ? 'r' : '-';
 127     buffer[3] = (prot & VPROT_WRITE) ?
 128                     ((prot & VPROT_WRITECOPY) ? 'w' : 'W') : '-';
 129     buffer[4] = (prot & VPROT_EXEC) ? 'x' : '-';
 130     buffer[5] = 0;
 131     return buffer;
 132 }
 133
 134
 135 /***********************************************************************
 136  *           VIRTUAL_DumpView
 137  */
 138 static void VIRTUAL_DumpView( FILE_VIEW *view )
 139 {
 140     UINT i, count;
 141     char *addr = view->base;
 142     BYTE prot = view->prot[0];
 143
 144     DPRINTF( "View: %p - %p", addr, addr + view->size - 1 );
 145     if (view->flags & VFLAG_SYSTEM)
 146         DPRINTF( " (system)\n" );
 147     else if (view->flags & VFLAG_VALLOC)
 148         DPRINTF( " (valloc)\n" );
 149     else if (view->mapping)
 150         DPRINTF( " %d\n", view->mapping );
 151     else
 152         DPRINTF( " (anonymous)\n");
 153
 154     for (count = i = 1; i < view->size >> page_shift; i++, count++)
 155     {
 156         if (view->prot[i] == prot) continue;
 157         DPRINTF( "      %p - %p %s\n",
 158                  addr, addr + (count << page_shift) - 1, VIRTUAL_GetProtStr(prot) );
 159         addr += (count << page_shift);
 160         prot = view->prot[i];
 161         count = 0;
 162     }
 163     if (count)
 164         DPRINTF( "      %p - %p %s\n",
 165                  addr, addr + (count << page_shift) - 1, VIRTUAL_GetProtStr(prot) );
 166 }
 167
 168
 169 /***********************************************************************
 170  *           VIRTUAL_Dump
 171  */
 172 void VIRTUAL_Dump(void)
 173 {
 174     FILE_VIEW *view;
 175     DPRINTF( "\nDump of all virtual memory views:\n\n" );
 176     EnterCriticalSection(&csVirtual);
 177     view = VIRTUAL_FirstView;
 178     while (view)
 179     {
 180         VIRTUAL_DumpView( view );
 181         view = view->next;
 182     }
 183     LeaveCriticalSection(&csVirtual);
 184 }
 185
 186
 187 /***********************************************************************
 188  *           VIRTUAL_FindView
 189  *
 190  * Find the view containing a given address.
 191  *
 192  * RETURNS
 193  *      View: Success
 194  *      NULL: Failure
 195  */
 196 static FILE_VIEW *VIRTUAL_FindView( const void *addr ) /* [in] Address */
 197 {
 198     FILE_VIEW *view;
 199
 200     EnterCriticalSection(&csVirtual);
 201     view = VIRTUAL_FirstView;
 202     while (view)
 203     {
 204         if (view->base > addr)
 205         {
 206             view = NULL;
 207             break;
 208         }
 209         if (view->base + view->size > addr) break;
 210         view = view->next;
 211     }
 212     LeaveCriticalSection(&csVirtual);
 213     return view;
 214 }
 215
 216
 217 /***********************************************************************
 218  *           VIRTUAL_CreateView
 219  *
 220  * Create a new view and add it in the linked list.
 221  */
 222 static FILE_VIEW *VIRTUAL_CreateView( void *base, UINT size, UINT flags,
 223                                       BYTE vprot, HANDLE mapping )
 224 {
 225     FILE_VIEW *view, *prev;
 226
 227     /* Create the view structure */
 228
 229     assert( !((unsigned int)base & page_mask) );
 230     assert( !(size & page_mask) );
 231     size >>= page_shift;
 232     if (!(view = (FILE_VIEW *)malloc( sizeof(*view) + size - 1 ))) return NULL;
 233     view->base    = base;
 234     view->size    = size << page_shift;
 235     view->flags   = flags;
 236     view->mapping = mapping;
 237     view->protect = vprot;
 238     view->handlerProc = NULL;
 239     memset( view->prot, vprot, size );
 240
 241     /* Duplicate the mapping handle */
 242
 243     if (view->mapping &&
 244         !DuplicateHandle( GetCurrentProcess(), view->mapping,
 245                           GetCurrentProcess(), &view->mapping,
 246                           0, FALSE, DUPLICATE_SAME_ACCESS ))
 247     {
 248         free( view );
 249         return NULL;
 250     }
 251
 252     /* Insert it in the linked list */
 253
 254     EnterCriticalSection(&csVirtual);
 255     if (!VIRTUAL_FirstView || (VIRTUAL_FirstView->base > base))
 256     {
 257         view->next = VIRTUAL_FirstView;
 258         view->prev = NULL;
 259         if (view->next) view->next->prev = view;
 260         VIRTUAL_FirstView = view;
 261     }
 262     else
 263     {
 264         prev = VIRTUAL_FirstView;
 265         while (prev->next && (prev->next->base < base)) prev = prev->next;
 266         view->next = prev->next;
 267         view->prev = prev;
 268         if (view->next) view->next->prev = view;
 269         prev->next  = view;
 270     }
 271     LeaveCriticalSection(&csVirtual);
 272     VIRTUAL_DEBUG_DUMP_VIEW( view );
 273     return view;
 274 }
 275
 276
 277 /***********************************************************************
 278  *           VIRTUAL_DeleteView
 279  * Deletes a view.
 280  *
 281  * RETURNS
 282  *      None
 283  */
 284 static void VIRTUAL_DeleteView(
 285             FILE_VIEW *view /* [in] View */
 286 ) {
 287     if (!(view->flags & VFLAG_SYSTEM))
 288         munmap( (void *)view->base, view->size );
 289     EnterCriticalSection(&csVirtual);
 290     if (view->next) view->next->prev = view->prev;
 291     if (view->prev) view->prev->next = view->next;
 292     else VIRTUAL_FirstView = view->next;
 293     LeaveCriticalSection(&csVirtual);
 294     if (view->mapping) NtClose( view->mapping );
 295     free( view );
 296 }
 297
 298
 299 /***********************************************************************
 300  *           VIRTUAL_GetUnixProt
 301  *
 302  * Convert page protections to protection for mmap/mprotect.
 303  */
 304 static int VIRTUAL_GetUnixProt( BYTE vprot )
 305 {
 306     int prot = 0;
 307     if ((vprot & VPROT_COMMITTED) && !(vprot & VPROT_GUARD))
 308     {
 309         if (vprot & VPROT_READ) prot |= PROT_READ;
 310         if (vprot & VPROT_WRITE) prot |= PROT_WRITE;
 311         if (vprot & VPROT_WRITECOPY) prot |= PROT_WRITE;
 312         if (vprot & VPROT_EXEC) prot |= PROT_EXEC;
 313     }
 314     return prot;
 315 }
 316
 317
 318 /***********************************************************************
 319  *           VIRTUAL_GetWin32Prot
 320  *
 321  * Convert page protections to Win32 flags.
 322  *
 323  * RETURNS
 324  *      None
 325  */
 326 static void VIRTUAL_GetWin32Prot(
 327             BYTE vprot,     /* [in] Page protection flags */
 328             DWORD *protect, /* [out] Location to store Win32 protection flags */
 329             DWORD *state    /* [out] Location to store mem state flag */
 330 ) {
 331     if (protect) {
 332         *protect = VIRTUAL_Win32Flags[vprot & 0x0f];
 333 /*      if (vprot & VPROT_GUARD) *protect |= PAGE_GUARD;*/
 334         if (vprot & VPROT_NOCACHE) *protect |= PAGE_NOCACHE;
 335
 336         if (vprot & VPROT_GUARD) *protect = PAGE_NOACCESS;
 337     }
 338
 339     if (state) *state = (vprot & VPROT_COMMITTED) ? MEM_COMMIT : MEM_RESERVE;
 340 }
 341
 342
 343 /***********************************************************************
 344  *           VIRTUAL_GetProt
 345  *
 346  * Build page protections from Win32 flags.
 347  *
 348  * RETURNS
 349  *      Value of page protection flags
 350  */
 351 static BYTE VIRTUAL_GetProt(
 352             DWORD protect  /* [in] Win32 protection flags */
 353 ) {
 354     BYTE vprot;
 355
 356     switch(protect & 0xff)
 357     {
 358     case PAGE_READONLY:
 359         vprot = VPROT_READ;
 360         break;
 361     case PAGE_READWRITE:
 362         vprot = VPROT_READ | VPROT_WRITE;
 363         break;
 364     case PAGE_WRITECOPY:
 365         /* MSDN CreateFileMapping() states that if PAGE_WRITECOPY is given,
 366          * that the hFile must have been opened with GENERIC_READ and
 367          * GENERIC_WRITE access.  This is WRONG as tests show that you
 368          * only need GENERIC_READ access (at least for Win9x,
 369          * FIXME: what about NT?).  Thus, we don't put VPROT_WRITE in
 370          * PAGE_WRITECOPY and PAGE_EXECUTE_WRITECOPY.
 371          */
 372         vprot = VPROT_READ | VPROT_WRITECOPY;
 373         break;
 374     case PAGE_EXECUTE:
 375         vprot = VPROT_EXEC;
 376         break;
 377     case PAGE_EXECUTE_READ:
 378         vprot = VPROT_EXEC | VPROT_READ;
 379         break;
 380     case PAGE_EXECUTE_READWRITE:
 381         vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE;
 382         break;
 383     case PAGE_EXECUTE_WRITECOPY:
 384         /* See comment for PAGE_WRITECOPY above */
 385         vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITECOPY;
 386         break;
 387     case PAGE_NOACCESS:
 388     default:
 389         vprot = 0;
 390         break;
 391     }
 392     if (protect & PAGE_GUARD) vprot |= VPROT_GUARD;
 393     if (protect & PAGE_NOCACHE) vprot |= VPROT_NOCACHE;
 394     return vprot;
 395 }
 396
 397
 398 /***********************************************************************
 399  *           VIRTUAL_SetProt
 400  *
 401  * Change the protection of a range of pages.
 402  *
 403  * RETURNS
 404  *      TRUE: Success
 405  *      FALSE: Failure
 406  */
 407 static BOOL VIRTUAL_SetProt( FILE_VIEW *view, /* [in] Pointer to view */
 408                              void *base,      /* [in] Starting address */
 409                              UINT size,       /* [in] Size in bytes */
 410                              BYTE vprot )     /* [in] Protections to use */
 411 {
 412     TRACE("%p-%p %s\n",
 413           base, (char *)base + size - 1, VIRTUAL_GetProtStr( vprot ) );
 414
 415     if (mprotect( base, size, VIRTUAL_GetUnixProt(vprot) ))
 416         return FALSE;  /* FIXME: last error */
 417
 418     memset( view->prot + (((char *)base - (char *)view->base) >> page_shift),
 419             vprot, size >> page_shift );
 420     VIRTUAL_DEBUG_DUMP_VIEW( view );
 421     return TRUE;
 422 }
 423
 424
 425 /***********************************************************************
 426  *           anon_mmap_aligned
 427  *
 428  * Create an anonymous mapping aligned to the allocation granularity.
 429  */
 430 static void *anon_mmap_aligned( void *base, unsigned int size, int prot, int flags )
 431 {
 432     void *ptr;
 433     unsigned int view_size = size + (base ? 0 : granularity_mask + 1);
 434
 435     if ((ptr = wine_anon_mmap( base, view_size, prot, flags )) == (void *)-1)
 436     {
 437         /* KB: Q125713, 25-SEP-1995, "Common File Mapping Problems and
 438          * Platform Differences":
 439          * Windows NT: ERROR_INVALID_PARAMETER
 440          * Windows 95: ERROR_INVALID_ADDRESS.
 441          */
 442         if (errno == ENOMEM) SetLastError( ERROR_OUTOFMEMORY );
 443         else
 444         {
 445             if (GetVersion() & 0x80000000)  /* win95 */
 446                 SetLastError( ERROR_INVALID_ADDRESS );
 447             else
 448                 SetLastError( ERROR_INVALID_PARAMETER );
 449         }
 450         return ptr;
 451     }
 452
 453     if (!base)
 454     {
 455         /* Release the extra memory while keeping the range
 456          * starting on the granularity boundary. */
 457         if ((unsigned int)ptr & granularity_mask)
 458         {
 459             unsigned int extra = granularity_mask + 1 - ((unsigned int)ptr & granularity_mask);
 460             munmap( ptr, extra );
 461             ptr = (char *)ptr + extra;
 462             view_size -= extra;
 463         }
 464         if (view_size > size)
 465             munmap( (char *)ptr + size, view_size - size );
 466     }
 467     else if (ptr != base)
 468     {
 469         /* We couldn't get the address we wanted */
 470         munmap( ptr, view_size );
 471         SetLastError( ERROR_INVALID_ADDRESS );
 472         ptr = (void *)-1;
 473     }
 474     return ptr;
 475 }
 476
 477
 478 /***********************************************************************
 479  *           map_image
 480  *
 481  * Map an executable (PE format) image into memory.
 482  */
 483 static LPVOID map_image( HANDLE hmapping, int fd, char *base, DWORD total_size,
 484                          DWORD header_size, HANDLE shared_file, DWORD shared_size,
 485                          BOOL removable )
 486 {
 487     IMAGE_DOS_HEADER *dos;
 488     IMAGE_NT_HEADERS *nt;
 489     IMAGE_SECTION_HEADER *sec;
 490     int i, pos;
 491     DWORD err = GetLastError();
 492     FILE_VIEW *view;
 493     char *ptr;
 494     int shared_fd = -1;
 495
 496     SetLastError( ERROR_BAD_EXE_FORMAT );  /* generic error */
 497
 498     /* zero-map the whole range */
 499
 500     if ((ptr = wine_anon_mmap( base, total_size,
 501                              PROT_READ | PROT_WRITE | PROT_EXEC, 0 )) == (char *)-1)
 502     {
 503         ptr = wine_anon_mmap( NULL, total_size,
 504                             PROT_READ | PROT_WRITE | PROT_EXEC, 0 );
 505         if (ptr == (char *)-1)
 506         {
 507             ERR_(module)("Not enough memory for module (%ld bytes)\n", total_size);
 508             goto error;
 509         }
 510     }
 511     TRACE_(module)( "mapped PE file at %p-%p\n", ptr, ptr + total_size );
 512
 513     /* map the header */
 514
 515     if (VIRTUAL_mmap( fd, ptr, header_size, 0, 0, PROT_READ,
 516                       MAP_PRIVATE | MAP_FIXED, &removable ) == (char *)-1) goto error;
 517     dos = (IMAGE_DOS_HEADER *)ptr;
 518     nt = (IMAGE_NT_HEADERS *)(ptr + dos->e_lfanew);
 519     if ((char *)(nt + 1) > ptr + header_size) goto error;
 520
 521     sec = (IMAGE_SECTION_HEADER*)((char*)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader);
 522     if ((char *)(sec + nt->FileHeader.NumberOfSections) > ptr + header_size) goto error;
 523
 524     /* check the architecture */
 525
 526     if (nt->FileHeader.Machine != IMAGE_FILE_MACHINE_I386)
 527     {
 528         MESSAGE("Trying to load PE image for unsupported architecture (");
 529         switch (nt->FileHeader.Machine)
 530         {
 531         case IMAGE_FILE_MACHINE_UNKNOWN: MESSAGE("Unknown"); break;
 532         case IMAGE_FILE_MACHINE_I860:    MESSAGE("I860"); break;
 533         case IMAGE_FILE_MACHINE_R3000:   MESSAGE("R3000"); break;
 534         case IMAGE_FILE_MACHINE_R4000:   MESSAGE("R4000"); break;
 535         case IMAGE_FILE_MACHINE_R10000:  MESSAGE("R10000"); break;
 536         case IMAGE_FILE_MACHINE_ALPHA:   MESSAGE("Alpha"); break;
 537         case IMAGE_FILE_MACHINE_POWERPC: MESSAGE("PowerPC"); break;
 538         default: MESSAGE("Unknown-%04x", nt->FileHeader.Machine); break;
 539         }
 540         MESSAGE(")\n");
 541         goto error;
 542     }
 543
 544     /* retrieve the shared sections file */
 545
 546     if (shared_size)
 547     {
 548         if ((shared_fd = FILE_GetUnixHandle( shared_file, GENERIC_READ )) == -1) goto error;
 549         CloseHandle( shared_file );  /* we no longer need it */
 550         shared_file = 0;
 551     }
 552
 553     /* map all the sections */
 554
 555     for (i = pos = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
 556     {
 557         DWORD size;
 558
 559         /* a few sanity checks */
 560         size = sec->VirtualAddress + ROUND_SIZE( sec->VirtualAddress, sec->Misc.VirtualSize );
 561         if (sec->VirtualAddress > total_size || size > total_size || size < sec->VirtualAddress)
 562         {
 563             ERR_(module)( "Section %.8s too large (%lx+%lx/%lx)\n",
 564                           sec->Name, sec->VirtualAddress, sec->Misc.VirtualSize, total_size );
 565             goto error;
 566         }
 567
 568         if ((sec->Characteristics & IMAGE_SCN_MEM_SHARED) &&
 569             (sec->Characteristics & IMAGE_SCN_MEM_WRITE))
 570         {
 571             size = ROUND_SIZE( 0, sec->Misc.VirtualSize );
 572             TRACE_(module)( "mapping shared section %.8s at %p off %lx (%x) size %lx (%lx) flags %lx\n",
 573                           sec->Name, ptr + sec->VirtualAddress,
 574                           sec->PointerToRawData, pos, sec->SizeOfRawData,
 575                           size, sec->Characteristics );
 576             if (VIRTUAL_mmap( shared_fd, ptr + sec->VirtualAddress, size,
 577                               pos, 0, PROT_READ|PROT_WRITE|PROT_EXEC,
 578                               MAP_SHARED|MAP_FIXED, NULL ) == (void *)-1)
 579             {
 580                 ERR_(module)( "Could not map shared section %.8s\n", sec->Name );
 581                 goto error;
 582             }
 583             pos += size;
 584             continue;
 585         }
 586
 587         if (sec->Characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA) continue;
 588         if (!sec->PointerToRawData || !sec->SizeOfRawData) continue;
 589
 590         TRACE_(module)( "mapping section %.8s at %p off %lx size %lx flags %lx\n",
 591                         sec->Name, ptr + sec->VirtualAddress,
 592                         sec->PointerToRawData, sec->SizeOfRawData,
 593                         sec->Characteristics );
 594
 595         /* Note: if the section is not aligned properly VIRTUAL_mmap will magically
 596          *       fall back to read(), so we don't need to check anything here.
 597          */
 598         if (VIRTUAL_mmap( fd, ptr + sec->VirtualAddress, sec->SizeOfRawData,
 599                           sec->PointerToRawData, 0, PROT_READ|PROT_WRITE|PROT_EXEC,
 600                           MAP_PRIVATE | MAP_FIXED, &removable ) == (void *)-1)
 601         {
 602             ERR_(module)( "Could not map section %.8s, file probably truncated\n", sec->Name );
 603             goto error;
 604         }
 605
 606         if ((sec->SizeOfRawData < sec->Misc.VirtualSize) && (sec->SizeOfRawData & page_mask))
 607         {
 608             DWORD end = ROUND_SIZE( 0, sec->SizeOfRawData );
 609             if (end > sec->Misc.VirtualSize) end = sec->Misc.VirtualSize;
 610             TRACE_(module)("clearing %p - %p\n",
 611                            ptr + sec->VirtualAddress + sec->SizeOfRawData,
 612                            ptr + sec->VirtualAddress + end );
 613             memset( ptr + sec->VirtualAddress + sec->SizeOfRawData, 0,
 614                     end - sec->SizeOfRawData );
 615         }
 616     }
 617
 618     if (removable) hmapping = 0;  /* don't keep handle open on removable media */
 619     if (!(view = VIRTUAL_CreateView( ptr, total_size, 0,
 620                                      VPROT_COMMITTED|VPROT_READ|VPROT_WRITE|VPROT_WRITECOPY,
 621                                      hmapping )))
 622     {
 623         SetLastError( ERROR_OUTOFMEMORY );
 624         goto error;
 625     }
 626
 627     SetLastError( err );  /* restore last error */
 628     close( fd );
 629     if (shared_fd != -1) close( shared_fd );
 630     return ptr;
 631
 632  error:
 633     if (ptr != (char *)-1) munmap( ptr, total_size );
 634     close( fd );
 635     if (shared_fd != -1) close( shared_fd );
 636     if (shared_file) CloseHandle( shared_file );
 637     return NULL;
 638 }
 639
 640
 641 /***********************************************************************
 642  *           VIRTUAL_Init
 643  */
 644 #ifndef page_mask
 645 DECL_GLOBAL_CONSTRUCTOR(VIRTUAL_Init)
 646 {
 647     page_size = getpagesize();
 648     page_mask = page_size - 1;
 649     /* Make sure we have a power of 2 */
 650     assert( !(page_size & page_mask) );
 651     page_shift = 0;
 652     while ((1 << page_shift) != page_size) page_shift++;
 653 }
 654 #endif  /* page_mask */
 655
 656
 657 /***********************************************************************
 658  *           VIRTUAL_SetFaultHandler
 659  */
 660 BOOL VIRTUAL_SetFaultHandler( LPCVOID addr, HANDLERPROC proc, LPVOID arg )
 661 {
 662     FILE_VIEW *view;
 663
 664     if (!(view = VIRTUAL_FindView( addr ))) return FALSE;
 665     view->handlerProc = proc;
 666     view->handlerArg  = arg;
 667     return TRUE;
 668 }
 669
 670 /***********************************************************************
 671  *           VIRTUAL_HandleFault
 672  */
 673 DWORD VIRTUAL_HandleFault( LPCVOID addr )
 674 {
 675     FILE_VIEW *view = VIRTUAL_FindView( addr );
 676     DWORD ret = EXCEPTION_ACCESS_VIOLATION;
 677
 678     if (view)
 679     {
 680         if (view->handlerProc)
 681         {
 682             if (view->handlerProc(view->handlerArg, addr)) ret = 0;  /* handled */
 683         }
 684         else
 685         {
 686             BYTE vprot = view->prot[((char *)addr - (char *)view->base) >> page_shift];
 687             void *page = (void *)((UINT_PTR)addr & ~page_mask);
 688             char *stack = (char *)NtCurrentTeb()->stack_base + SIGNAL_STACK_SIZE + page_mask + 1;
 689             if (vprot & VPROT_GUARD)
 690             {
 691                 VIRTUAL_SetProt( view, page, page_mask + 1, vprot & ~VPROT_GUARD );
 692                 ret = STATUS_GUARD_PAGE_VIOLATION;
 693             }
 694             /* is it inside the stack guard pages? */
 695             if (((char *)addr >= stack) && ((char *)addr < stack + 2*(page_mask+1)))
 696                 ret = STATUS_STACK_OVERFLOW;
 697         }
 698     }
 699     return ret;
 700 }
 701
 702
 703
 704 /***********************************************************************
 705  *           unaligned_mmap
 706  *
 707  * Linux kernels before 2.4.x can support non page-aligned offsets, as
 708  * long as the offset is aligned to the filesystem block size. This is
 709  * a big performance gain so we want to take advantage of it.
 710  *
 711  * However, when we use 64-bit file support this doesn't work because
 712  * glibc rejects unaligned offsets. Also glibc 2.1.3 mmap64 is broken
 713  * in that it rounds unaligned offsets down to a page boundary. For
 714  * these reasons we do a direct system call here.
 715  */
 716 static void *unaligned_mmap( void *addr, size_t length, unsigned int prot,
 717                              unsigned int flags, int fd, unsigned int offset_low,
 718                              unsigned int offset_high )
 719 {
 720 #if defined(linux) && defined(__i386__) && defined(__GNUC__)
 721     if (!offset_high && (offset_low & page_mask))
 722     {
 723         int ret;
 724         __asm__ __volatile__("push %%ebx\n\t"
 725                              "movl %2,%%ebx\n\t"
 726                              "int $0x80\n\t"
 727                              "popl %%ebx"
 728                              : "=a" (ret)
 729                              : "0" (90), /* SYS_mmap */
 730                                "g" (&addr) );
 731         if (ret < 0 && ret > -4096)
 732         {
 733             errno = -ret;
 734             ret = -1;
 735         }
 736         return (void *)ret;
 737     }
 738 #endif
 739     return mmap( addr, length, prot, flags, fd, ((off_t)offset_high << 32) | offset_low );
 740 }
 741
 742
 743 /***********************************************************************
 744  *           VIRTUAL_mmap
 745  *
 746  * Wrapper for mmap() that handles anonymous mappings portably,
 747  * and falls back to read if mmap of a file fails.
 748  */
 749 static LPVOID VIRTUAL_mmap( int fd, LPVOID start, DWORD size,
 750                             DWORD offset_low, DWORD offset_high,
 751                             int prot, int flags, BOOL *removable )
 752 {
 753     int pos;
 754     LPVOID ret;
 755     off_t offset;
 756     BOOL is_shared_write = FALSE;
 757
 758     if (fd == -1) return wine_anon_mmap( start, size, prot, flags );
 759
 760     if (prot & PROT_WRITE)
 761     {
 762 #ifdef MAP_SHARED
 763         if (flags & MAP_SHARED) is_shared_write = TRUE;
 764 #endif
 765 #ifdef MAP_PRIVATE
 766         if (!(flags & MAP_PRIVATE)) is_shared_write = TRUE;
 767 #endif
 768     }
 769
 770     if (removable && *removable)
 771     {
 772         /* if on removable media, try using read instead of mmap */
 773         if (!is_shared_write) goto fake_mmap;
 774         *removable = FALSE;
 775     }
 776
 777     if ((ret = unaligned_mmap( start, size, prot, flags, fd,
 778                                offset_low, offset_high )) != (LPVOID)-1) return ret;
 779
 780     /* mmap() failed; if this is because the file offset is not    */
 781     /* page-aligned (EINVAL), or because the underlying filesystem */
 782     /* does not support mmap() (ENOEXEC,ENODEV), we do it by hand. */
 783
 784     if ((errno != ENOEXEC) && (errno != EINVAL) && (errno != ENODEV)) return ret;
 785     if (is_shared_write) return ret;  /* we cannot fake shared write mappings */
 786
 787  fake_mmap:
 788     /* Reserve the memory with an anonymous mmap */
 789     ret = wine_anon_mmap( start, size, PROT_READ | PROT_WRITE, flags );
 790     if (ret == (LPVOID)-1) return ret;
 791     /* Now read in the file */
 792     offset = ((off_t)offset_high << 32) | offset_low;
 793     if ((pos = lseek( fd, offset, SEEK_SET )) == -1)
 794     {
 795         munmap( ret, size );
 796         return (LPVOID)-1;
 797     }
 798     read( fd, ret, size );
 799     lseek( fd, pos, SEEK_SET );  /* Restore the file pointer */
 800     mprotect( ret, size, prot );  /* Set the right protection */
 801     return ret;
 802 }
 803
 804
 805 /***********************************************************************
 806  *             VirtualAlloc   (KERNEL32.@)
 807  * Reserves or commits a region of pages in virtual address space
 808  *
 809  * RETURNS
 810  *      Base address of allocated region of pages
 811  *      NULL: Failure
 812  */
 813 LPVOID WINAPI VirtualAlloc(
 814               LPVOID addr,  /* [in] Address of region to reserve or commit */
 815               DWORD size,   /* [in] Size of region */
 816               DWORD type,   /* [in] Type of allocation */
 817               DWORD protect)/* [in] Type of access protection */
 818 {
 819     FILE_VIEW *view;
 820     char *ptr, *base;
 821     BYTE vprot;
 822
 823     TRACE("%p %08lx %lx %08lx\n", addr, size, type, protect );
 824
 825     /* Round parameters to a page boundary */
 826
 827     if (size > 0x7fc00000)  /* 2Gb - 4Mb */
 828     {
 829         SetLastError( ERROR_OUTOFMEMORY );
 830         return NULL;
 831     }
 832     if (addr)
 833     {
 834         if (type & MEM_RESERVE) /* Round down to 64k boundary */
 835             base = ROUND_ADDR( addr, granularity_mask );
 836         else
 837             base = ROUND_ADDR( addr, page_mask );
 838         size = (((UINT_PTR)addr + size + page_mask) & ~page_mask) - (UINT_PTR)base;
 839         if ((base <= (char *)granularity_mask) || (base + size < base))
 840         {
 841             /* disallow low 64k and wrap-around */
 842             SetLastError( ERROR_INVALID_PARAMETER );
 843             return NULL;
 844         }
 845     }
 846     else
 847     {
 848         base = 0;
 849         size = (size + page_mask) & ~page_mask;
 850     }
 851
 852     if (type & MEM_TOP_DOWN) {
 853         /* FIXME: MEM_TOP_DOWN allocates the largest possible address.
 854          *        Is there _ANY_ way to do it with UNIX mmap()?
 855          */
 856         WARN("MEM_TOP_DOWN ignored\n");
 857         type &= ~MEM_TOP_DOWN;
 858     }
 859     /* Compute the alloc type flags */
 860
 861     if (!(type & (MEM_COMMIT | MEM_RESERVE | MEM_SYSTEM)) ||
 862         (type & ~(MEM_COMMIT | MEM_RESERVE | MEM_SYSTEM)))
 863     {
 864         ERR("called with wrong alloc type flags (%08lx) !\n", type);
 865         SetLastError( ERROR_INVALID_PARAMETER );
 866         return NULL;
 867     }
 868     if (type & (MEM_COMMIT | MEM_SYSTEM))
 869         vprot = VIRTUAL_GetProt( protect ) | VPROT_COMMITTED;
 870     else vprot = 0;
 871
 872     /* Reserve the memory */
 873
 874     if ((type & MEM_RESERVE) || !base)
 875     {
 876         if (type & MEM_SYSTEM)
 877         {
 878             if (!(view = VIRTUAL_CreateView( base, size, VFLAG_VALLOC | VFLAG_SYSTEM, vprot, 0 )))
 879             {
 880                 SetLastError( ERROR_OUTOFMEMORY );
 881                 return NULL;
 882             }
 883             return (LPVOID)base;
 884         }
 885         ptr = anon_mmap_aligned( base, size, VIRTUAL_GetUnixProt( vprot ), 0 );
 886         if (ptr == (void *)-1) return NULL;
 887
 888         if (!(view = VIRTUAL_CreateView( ptr, size, VFLAG_VALLOC, vprot, 0 )))
 889         {
 890             munmap( ptr, size );
 891             SetLastError( ERROR_OUTOFMEMORY );
 892             return NULL;
 893         }
 894         return ptr;
 895     }
 896
 897     /* Commit the pages */
 898
 899     if (!(view = VIRTUAL_FindView( base )) ||
 900         (base + size > (char *)view->base + view->size))
 901     {
 902         SetLastError( ERROR_INVALID_ADDRESS );
 903         return NULL;
 904     }
 905
 906     if (!VIRTUAL_SetProt( view, base, size, vprot )) return NULL;
 907     return (LPVOID)base;
 908 }
 909
 910
 911 /***********************************************************************
 912  *             VirtualAllocEx   (KERNEL32.@)
 913  *
 914  * Seems to be just as VirtualAlloc, but with process handle.
 915  */
 916 LPVOID WINAPI VirtualAllocEx(
 917               HANDLE hProcess, /* [in] Handle of process to do mem operation */
 918               LPVOID addr,  /* [in] Address of region to reserve or commit */
 919               DWORD size,   /* [in] Size of region */
 920               DWORD type,   /* [in] Type of allocation */
 921               DWORD protect /* [in] Type of access protection */
 922 ) {
 923     if (MapProcessHandle( hProcess ) == GetCurrentProcessId())
 924         return VirtualAlloc( addr, size, type, protect );
 925     ERR("Unsupported on other process\n");
 926     return NULL;
 927 }
 928
 929
 930 /***********************************************************************
 931  *             VirtualFree   (KERNEL32.@)
 932  * Release or decommits a region of pages in virtual address space.
 933  *
 934  * RETURNS
 935  *      TRUE: Success
 936  *      FALSE: Failure
 937  */
 938 BOOL WINAPI VirtualFree(
 939               LPVOID addr, /* [in] Address of region of committed pages */
 940               DWORD size,  /* [in] Size of region */
 941               DWORD type   /* [in] Type of operation */
 942 ) {
 943     FILE_VIEW *view;
 944     char *base;
 945
 946     TRACE("%p %08lx %lx\n", addr, size, type );
 947
 948     /* Fix the parameters */
 949
 950     size = ROUND_SIZE( addr, size );
 951     base = ROUND_ADDR( addr, page_mask );
 952
 953     if (!(view = VIRTUAL_FindView( base )) ||
 954         (base + size > (char *)view->base + view->size) ||
 955         !(view->flags & VFLAG_VALLOC))
 956     {
 957         SetLastError( ERROR_INVALID_PARAMETER );
 958         return FALSE;
 959     }
 960
 961     /* Compute the protection flags */
 962
 963     if ((type != MEM_DECOMMIT) && (type != MEM_RELEASE))
 964     {
 965         ERR("called with wrong free type flags (%08lx) !\n", type);
 966         SetLastError( ERROR_INVALID_PARAMETER );
 967         return FALSE;
 968     }
 969
 970     /* Free the pages */
 971
 972     if (type == MEM_RELEASE)
 973     {
 974         if (size || (base != view->base))
 975         {
 976             SetLastError( ERROR_INVALID_PARAMETER );
 977             return FALSE;
 978         }
 979         VIRTUAL_DeleteView( view );
 980         return TRUE;
 981     }
 982
 983     /* Decommit the pages by remapping zero-pages instead */
 984
 985     if (wine_anon_mmap( (LPVOID)base, size, VIRTUAL_GetUnixProt(0), MAP_FIXED ) != (LPVOID)base)
 986         ERR( "Could not remap pages, expect trouble\n" );
 987     return VIRTUAL_SetProt( view, base, size, 0 );
 988 }
 989
 990
 991 /***********************************************************************
 992  *             VirtualLock   (KERNEL32.@)
 993  * Locks the specified region of virtual address space
 994  *
 995  * NOTE
 996  *      Always returns TRUE
 997  *
 998  * RETURNS
 999  *      TRUE: Success
1000  *      FALSE: Failure
1001  */
1002 BOOL WINAPI VirtualLock(
1003               LPVOID addr, /* [in] Address of first byte of range to lock */
1004               DWORD size   /* [in] Number of bytes in range to lock */
1005 ) {
1006     return TRUE;
1007 }
1008
1009
1010 /***********************************************************************
1011  *             VirtualUnlock   (KERNEL32.@)
1012  * Unlocks a range of pages in the virtual address space
1013  *
1014  * NOTE
1015  *      Always returns TRUE
1016  *
1017  * RETURNS
1018  *      TRUE: Success
1019  *      FALSE: Failure
1020  */
1021 BOOL WINAPI VirtualUnlock(
1022               LPVOID addr, /* [in] Address of first byte of range */
1023               DWORD size   /* [in] Number of bytes in range */
1024 ) {
1025     return TRUE;
1026 }
1027
1028
1029 /***********************************************************************
1030  *             VirtualProtect   (KERNEL32.@)
1031  * Changes the access protection on a region of committed pages
1032  *
1033  * RETURNS
1034  *      TRUE: Success
1035  *      FALSE: Failure
1036  */
1037 BOOL WINAPI VirtualProtect(
1038               LPVOID addr,     /* [in] Address of region of committed pages */
1039               DWORD size,      /* [in] Size of region */
1040               DWORD new_prot,  /* [in] Desired access protection */
1041               LPDWORD old_prot /* [out] Address of variable to get old protection */
1042 ) {
1043     FILE_VIEW *view;
1044     char *base;
1045     UINT i;
1046     BYTE vprot, *p;
1047     DWORD prot;
1048
1049     TRACE("%p %08lx %08lx\n", addr, size, new_prot );
1050
1051     /* Fix the parameters */
1052
1053     size = ROUND_SIZE( addr, size );
1054     base = ROUND_ADDR( addr, page_mask );
1055
1056     if (!(view = VIRTUAL_FindView( base )) ||
1057         (base + size > (char *)view->base + view->size))
1058     {
1059         SetLastError( ERROR_INVALID_PARAMETER );
1060         return FALSE;
1061     }
1062
1063     /* Make sure all the pages are committed */
1064
1065     p = view->prot + ((base - (char *)view->base) >> page_shift);
1066     VIRTUAL_GetWin32Prot( *p, &prot, NULL );
1067     for (i = size >> page_shift; i; i--, p++)
1068     {
1069         if (!(*p & VPROT_COMMITTED))
1070         {
1071             SetLastError( ERROR_INVALID_PARAMETER );
1072             return FALSE;
1073         }
1074     }
1075
1076     if (old_prot) *old_prot = prot;
1077     vprot = VIRTUAL_GetProt( new_prot ) | VPROT_COMMITTED;
1078     return VIRTUAL_SetProt( view, base, size, vprot );
1079 }
1080
1081
1082 /***********************************************************************
1083  *             VirtualProtectEx   (KERNEL32.@)
1084  * Changes the access protection on a region of committed pages in the
1085  * virtual address space of a specified process
1086  *
1087  * RETURNS
1088  *      TRUE: Success
1089  *      FALSE: Failure
1090  */
1091 BOOL WINAPI VirtualProtectEx(
1092               HANDLE handle, /* [in]  Handle of process */
1093               LPVOID addr,     /* [in]  Address of region of committed pages */
1094               DWORD size,      /* [in]  Size of region */
1095               DWORD new_prot,  /* [in]  Desired access protection */
1096               LPDWORD old_prot /* [out] Address of variable to get old protection */ )
1097 {
1098     if (MapProcessHandle( handle ) == GetCurrentProcessId())
1099         return VirtualProtect( addr, size, new_prot, old_prot );
1100     ERR("Unsupported on other process\n");
1101     return FALSE;
1102 }
1103
1104
1105 /***********************************************************************
1106  *             VirtualQuery   (KERNEL32.@)
1107  * Provides info about a range of pages in virtual address space
1108  *
1109  * RETURNS
1110  *      Number of bytes returned in information buffer
1111  *      or 0 if addr is >= 0xc0000000 (kernel space).
1112  */
1113 DWORD WINAPI VirtualQuery(
1114              LPCVOID addr,                    /* [in]  Address of region */
1115              LPMEMORY_BASIC_INFORMATION info, /* [out] Address of info buffer */
1116              DWORD len                        /* [in]  Size of buffer */
1117 ) {
1118     FILE_VIEW *view;
1119     char *base, *alloc_base = 0;
1120     UINT size = 0;
1121
1122     if (addr >= (void*)0xc0000000) return 0;
1123
1124     base = ROUND_ADDR( addr, page_mask );
1125
1126     /* Find the view containing the address */
1127
1128     EnterCriticalSection(&csVirtual);
1129     view = VIRTUAL_FirstView;
1130     for (;;)
1131     {
1132         if (!view)
1133         {
1134             size = (char *)0xffff0000 - alloc_base;
1135             break;
1136         }
1137         if ((char *)view->base > base)
1138         {
1139             size = (char *)view->base - alloc_base;
1140             view = NULL;
1141             break;
1142         }
1143         if ((char *)view->base + view->size > base)
1144         {
1145             alloc_base = view->base;
1146             size = view->size;
1147             break;
1148         }
1149         alloc_base = (char *)view->base + view->size;
1150         view = view->next;
1151     }
1152     LeaveCriticalSection(&csVirtual);
1153
1154     /* Fill the info structure */
1155
1156     if (!view)
1157     {
1158         info->State             = MEM_FREE;
1159         info->Protect           = 0;
1160         info->AllocationProtect = 0;
1161         info->Type              = 0;
1162     }
1163     else
1164     {
1165         BYTE vprot = view->prot[(base - alloc_base) >> page_shift];
1166         VIRTUAL_GetWin32Prot( vprot, &info->Protect, &info->State );
1167         for (size = base - alloc_base; size < view->size; size += page_mask+1)
1168             if (view->prot[size >> page_shift] != vprot) break;
1169         info->AllocationProtect = view->protect;
1170         info->Type              = MEM_PRIVATE;  /* FIXME */
1171     }
1172
1173     info->BaseAddress    = (LPVOID)base;
1174     info->AllocationBase = (LPVOID)alloc_base;
1175     info->RegionSize     = size - (base - alloc_base);
1176     return sizeof(*info);
1177 }
1178
1179
1180 /***********************************************************************
1181  *             VirtualQueryEx   (KERNEL32.@)
1182  * Provides info about a range of pages in virtual address space of a
1183  * specified process
1184  *
1185  * RETURNS
1186  *      Number of bytes returned in information buffer
1187  */
1188 DWORD WINAPI VirtualQueryEx(
1189              HANDLE handle,                 /* [in] Handle of process */
1190              LPCVOID addr,                    /* [in] Address of region */
1191              LPMEMORY_BASIC_INFORMATION info, /* [out] Address of info buffer */
1192              DWORD len                        /* [in] Size of buffer */ )
1193 {
1194     if (MapProcessHandle( handle ) == GetCurrentProcessId())
1195         return VirtualQuery( addr, info, len );
1196     ERR("Unsupported on other process\n");
1197     return 0;
1198 }
1199
1200
1201 /***********************************************************************
1202  *             IsBadReadPtr   (KERNEL32.@)
1203  *
1204  * RETURNS
1205  *      FALSE: Process has read access to entire block
1206  *      TRUE: Otherwise
1207  */
1208 BOOL WINAPI IsBadReadPtr(
1209               LPCVOID ptr, /* [in] Address of memory block */
1210               UINT size )  /* [in] Size of block */
1211 {
1212     if (!size) return FALSE;  /* handle 0 size case w/o reference */
1213     __TRY
1214     {
1215         volatile const char *p = ptr;
1216         char dummy;
1217         UINT count = size;
1218
1219         while (count > page_size)
1220         {
1221             dummy = *p;
1222             p += page_size;
1223             count -= page_size;
1224         }
1225         dummy = p[0];
1226         dummy = p[count - 1];
1227     }
1228     __EXCEPT(page_fault) { return TRUE; }
1229     __ENDTRY
1230     return FALSE;
1231 }
1232
1233
1234 /***********************************************************************
1235  *             IsBadWritePtr   (KERNEL32.@)
1236  *
1237  * RETURNS
1238  *      FALSE: Process has write access to entire block
1239  *      TRUE: Otherwise
1240  */
1241 BOOL WINAPI IsBadWritePtr(
1242               LPVOID ptr, /* [in] Address of memory block */
1243               UINT size ) /* [in] Size of block in bytes */
1244 {
1245     if (!size) return FALSE;  /* handle 0 size case w/o reference */
1246     __TRY
1247     {
1248         volatile char *p = ptr;
1249         UINT count = size;
1250
1251         while (count > page_size)
1252         {
1253             *p |= 0;
1254             p += page_size;
1255             count -= page_size;
1256         }
1257         p[0] |= 0;
1258         p[count - 1] |= 0;
1259     }
1260     __EXCEPT(page_fault) { return TRUE; }
1261     __ENDTRY
1262     return FALSE;
1263 }
1264
1265
1266 /***********************************************************************
1267  *             IsBadHugeReadPtr   (KERNEL32.@)
1268  * RETURNS
1269  *      FALSE: Process has read access to entire block
1270  *      TRUE: Otherwise
1271  */
1272 BOOL WINAPI IsBadHugeReadPtr(
1273               LPCVOID ptr, /* [in] Address of memory block */
1274               UINT size  /* [in] Size of block */
1275 ) {
1276     return IsBadReadPtr( ptr, size );
1277 }
1278
1279
1280 /***********************************************************************
1281  *             IsBadHugeWritePtr   (KERNEL32.@)
1282  * RETURNS
1283  *      FALSE: Process has write access to entire block
1284  *      TRUE: Otherwise
1285  */
1286 BOOL WINAPI IsBadHugeWritePtr(
1287               LPVOID ptr, /* [in] Address of memory block */
1288               UINT size /* [in] Size of block */
1289 ) {
1290     return IsBadWritePtr( ptr, size );
1291 }
1292
1293
1294 /***********************************************************************
1295  *             IsBadCodePtr   (KERNEL32.@)
1296  *
1297  * RETURNS
1298  *      FALSE: Process has read access to specified memory
1299  *      TRUE: Otherwise
1300  */
1301 BOOL WINAPI IsBadCodePtr( FARPROC ptr ) /* [in] Address of function */
1302 {
1303     return IsBadReadPtr( ptr, 1 );
1304 }
1305
1306
1307 /***********************************************************************
1308  *             IsBadStringPtrA   (KERNEL32.@)
1309  *
1310  * RETURNS
1311  *      FALSE: Read access to all bytes in string
1312  *      TRUE: Else
1313  */
1314 BOOL WINAPI IsBadStringPtrA(
1315               LPCSTR str, /* [in] Address of string */
1316               UINT max )  /* [in] Maximum size of string */
1317 {
1318     __TRY
1319     {
1320         volatile const char *p = str;
1321         while (p != str + max) if (!*p++) break;
1322     }
1323     __EXCEPT(page_fault) { return TRUE; }
1324     __ENDTRY
1325     return FALSE;
1326 }
1327
1328
1329 /***********************************************************************
1330  *             IsBadStringPtrW   (KERNEL32.@)
1331  * See IsBadStringPtrA
1332  */
1333 BOOL WINAPI IsBadStringPtrW( LPCWSTR str, UINT max )
1334 {
1335     __TRY
1336     {
1337         volatile const WCHAR *p = str;
1338         while (p != str + max) if (!*p++) break;
1339     }
1340     __EXCEPT(page_fault) { return TRUE; }
1341     __ENDTRY
1342     return FALSE;
1343 }
1344
1345
1346 /***********************************************************************
1347  *             CreateFileMappingA   (KERNEL32.@)
1348  * Creates a named or unnamed file-mapping object for the specified file
1349  *
1350  * RETURNS
1351  *      Handle: Success
1352  *      0: Mapping object does not exist
1353  *      NULL: Failure
1354  */
1355 HANDLE WINAPI CreateFileMappingA(
1356                 HANDLE hFile,   /* [in] Handle of file to map */
1357                 SECURITY_ATTRIBUTES *sa, /* [in] Optional security attributes*/
1358                 DWORD protect,   /* [in] Protection for mapping object */
1359                 DWORD size_high, /* [in] High-order 32 bits of object size */
1360                 DWORD size_low,  /* [in] Low-order 32 bits of object size */
1361                 LPCSTR name      /* [in] Name of file-mapping object */ )
1362 {
1363     WCHAR buffer[MAX_PATH];
1364
1365     if (!name) return CreateFileMappingW( hFile, sa, protect, size_high, size_low, NULL );
1366
1367     if (!MultiByteToWideChar( CP_ACP, 0, name, -1, buffer, MAX_PATH ))
1368     {
1369         SetLastError( ERROR_FILENAME_EXCED_RANGE );
1370         return 0;
1371     }
1372     return CreateFileMappingW( hFile, sa, protect, size_high, size_low, buffer );
1373 }
1374
1375
1376 /***********************************************************************
1377  *             CreateFileMappingW   (KERNEL32.@)
1378  * See CreateFileMappingA
1379  */
1380 HANDLE WINAPI CreateFileMappingW( HANDLE hFile, LPSECURITY_ATTRIBUTES sa,
1381                                   DWORD protect, DWORD size_high,
1382                                   DWORD size_low, LPCWSTR name )
1383 {
1384     HANDLE ret;
1385     BYTE vprot;
1386     DWORD len = name ? strlenW(name) : 0;
1387
1388     /* Check parameters */
1389
1390     TRACE("(%x,%p,%08lx,%08lx%08lx,%s)\n",
1391           hFile, sa, protect, size_high, size_low, debugstr_w(name) );
1392
1393     if (len > MAX_PATH)
1394     {
1395         SetLastError( ERROR_FILENAME_EXCED_RANGE );
1396         return 0;
1397     }
1398
1399     vprot = VIRTUAL_GetProt( protect );
1400     if (protect & SEC_RESERVE)
1401     {
1402         if (hFile != INVALID_HANDLE_VALUE)
1403         {
1404             SetLastError( ERROR_INVALID_PARAMETER );
1405             return 0;
1406         }
1407     }
1408     else vprot |= VPROT_COMMITTED;
1409     if (protect & SEC_NOCACHE) vprot |= VPROT_NOCACHE;
1410     if (protect & SEC_IMAGE) vprot |= VPROT_IMAGE;
1411
1412     /* Create the server object */
1413
1414     if (hFile == INVALID_HANDLE_VALUE) hFile = 0;
1415     SERVER_START_REQ( create_mapping )
1416     {
1417         req->file_handle = hFile;
1418         req->size_high   = size_high;
1419         req->size_low    = size_low;
1420         req->protect     = vprot;
1421         req->inherit     = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle);
1422         wine_server_add_data( req, name, len * sizeof(WCHAR) );
1423         SetLastError(0);
1424         wine_server_call_err( req );
1425         ret = reply->handle;
1426     }
1427     SERVER_END_REQ;
1428     return ret;
1429 }
1430
1431
1432 /***********************************************************************
1433  *             OpenFileMappingA   (KERNEL32.@)
1434  * Opens a named file-mapping object.
1435  *
1436  * RETURNS
1437  *      Handle: Success
1438  *      NULL: Failure
1439  */
1440 HANDLE WINAPI OpenFileMappingA(
1441                 DWORD access,   /* [in] Access mode */
1442                 BOOL inherit, /* [in] Inherit flag */
1443                 LPCSTR name )   /* [in] Name of file-mapping object */
1444 {
1445     WCHAR buffer[MAX_PATH];
1446
1447     if (!name) return OpenFileMappingW( access, inherit, NULL );
1448
1449     if (!MultiByteToWideChar( CP_ACP, 0, name, -1, buffer, MAX_PATH ))
1450     {
1451         SetLastError( ERROR_FILENAME_EXCED_RANGE );
1452         return 0;
1453     }
1454     return OpenFileMappingW( access, inherit, buffer );
1455 }
1456
1457
1458 /***********************************************************************
1459  *             OpenFileMappingW   (KERNEL32.@)
1460  * See OpenFileMappingA
1461  */
1462 HANDLE WINAPI OpenFileMappingW( DWORD access, BOOL inherit, LPCWSTR name)
1463 {
1464     HANDLE ret;
1465     DWORD len = name ? strlenW(name) : 0;
1466     if (len >= MAX_PATH)
1467     {
1468         SetLastError( ERROR_FILENAME_EXCED_RANGE );
1469         return 0;
1470     }
1471     SERVER_START_REQ( open_mapping )
1472     {
1473         req->access  = access;
1474         req->inherit = inherit;
1475         wine_server_add_data( req, name, len * sizeof(WCHAR) );
1476         wine_server_call_err( req );
1477         ret = reply->handle;
1478     }
1479     SERVER_END_REQ;
1480     return ret;
1481 }
1482
1483
1484 /***********************************************************************
1485  *             MapViewOfFile   (KERNEL32.@)
1486  * Maps a view of a file into the address space
1487  *
1488  * RETURNS
1489  *      Starting address of mapped view
1490  *      NULL: Failure
1491  */
1492 LPVOID WINAPI MapViewOfFile(
1493               HANDLE mapping,  /* [in] File-mapping object to map */
1494               DWORD access,      /* [in] Access mode */
1495               DWORD offset_high, /* [in] High-order 32 bits of file offset */
1496               DWORD offset_low,  /* [in] Low-order 32 bits of file offset */
1497               DWORD count        /* [in] Number of bytes to map */
1498 ) {
1499     return MapViewOfFileEx( mapping, access, offset_high,
1500                             offset_low, count, NULL );
1501 }
1502
1503
1504 /***********************************************************************
1505  *             MapViewOfFileEx   (KERNEL32.@)
1506  * Maps a view of a file into the address space
1507  *
1508  * RETURNS
1509  *      Starting address of mapped view
1510  *      NULL: Failure
1511  */
1512 LPVOID WINAPI MapViewOfFileEx(
1513               HANDLE handle,   /* [in] File-mapping object to map */
1514               DWORD access,      /* [in] Access mode */
1515               DWORD offset_high, /* [in] High-order 32 bits of file offset */
1516               DWORD offset_low,  /* [in] Low-order 32 bits of file offset */
1517               DWORD count,       /* [in] Number of bytes to map */
1518               LPVOID addr        /* [in] Suggested starting address for mapped view */
1519 ) {
1520     FILE_VIEW *view;
1521     UINT size = 0;
1522     int flags = MAP_PRIVATE;
1523     int unix_handle = -1;
1524     int prot, res;
1525     void *base, *ptr = (void *)-1, *ret;
1526     DWORD size_low, size_high, header_size, shared_size;
1527     HANDLE shared_file;
1528     BOOL removable;
1529
1530     /* Check parameters */
1531
1532     if ((offset_low & granularity_mask) ||
1533         (addr && ((UINT_PTR)addr & granularity_mask)))
1534     {
1535         SetLastError( ERROR_INVALID_PARAMETER );
1536         return NULL;
1537     }
1538
1539     SERVER_START_REQ( get_mapping_info )
1540     {
1541         req->handle = handle;
1542         res = wine_server_call_err( req );
1543         prot        = reply->protect;
1544         base        = reply->base;
1545         size_low    = reply->size_low;
1546         size_high   = reply->size_high;
1547         header_size = reply->header_size;
1548         shared_file = reply->shared_file;
1549         shared_size = reply->shared_size;
1550         removable   = (reply->drive_type == DRIVE_REMOVABLE ||
1551                        reply->drive_type == DRIVE_CDROM);
1552     }
1553     SERVER_END_REQ;
1554     if (res) goto error;
1555
1556     if ((unix_handle = FILE_GetUnixHandle( handle, 0 )) == -1) goto error;
1557
1558     if (prot & VPROT_IMAGE)
1559         return map_image( handle, unix_handle, base, size_low, header_size,
1560                           shared_file, shared_size, removable );
1561
1562
1563     if (size_high)
1564         ERR("Sizes larger than 4Gb not supported\n");
1565
1566     if ((offset_low >= size_low) ||
1567         (count > size_low - offset_low))
1568     {
1569         SetLastError( ERROR_INVALID_PARAMETER );
1570         goto error;
1571     }
1572     if (count) size = ROUND_SIZE( offset_low, count );
1573     else size = size_low - offset_low;
1574
1575     switch(access)
1576     {
1577     case FILE_MAP_ALL_ACCESS:
1578     case FILE_MAP_WRITE:
1579     case FILE_MAP_WRITE | FILE_MAP_READ:
1580         if (!(prot & VPROT_WRITE))
1581         {
1582             SetLastError( ERROR_INVALID_PARAMETER );
1583             goto error;
1584         }
1585         flags = MAP_SHARED;
1586         /* fall through */
1587     case FILE_MAP_READ:
1588     case FILE_MAP_COPY:
1589     case FILE_MAP_COPY | FILE_MAP_READ:
1590         if (prot & VPROT_READ) break;
1591         /* fall through */
1592     default:
1593         SetLastError( ERROR_INVALID_PARAMETER );
1594         goto error;
1595     }
1596
1597     /* FIXME: If a mapping is created with SEC_RESERVE and a process,
1598      * which has a view of this mapping commits some pages, they will
1599      * appear commited in all other processes, which have the same
1600      * view created. Since we don`t support this yet, we create the
1601      * whole mapping commited.
1602      */
1603     prot |= VPROT_COMMITTED;
1604
1605     /* Reserve a properly aligned area */
1606
1607     if ((ptr = anon_mmap_aligned( addr, size, PROT_NONE, 0 )) == (void *)-1) goto error;
1608
1609     /* Map the file */
1610
1611     TRACE("handle=%x size=%x offset=%lx\n", handle, size, offset_low );
1612
1613     ret = VIRTUAL_mmap( unix_handle, ptr, size, offset_low, offset_high,
1614                         VIRTUAL_GetUnixProt( prot ), flags | MAP_FIXED, &removable );
1615     if (ret != ptr)
1616     {
1617         ERR( "VIRTUAL_mmap %p %x %lx%08lx failed\n", ptr, size, offset_high, offset_low );
1618         goto error;
1619     }
1620     if (removable) handle = 0;  /* don't keep handle open on removable media */
1621
1622     if (!(view = VIRTUAL_CreateView( ptr, size, 0, prot, handle )))
1623     {
1624         SetLastError( ERROR_OUTOFMEMORY );
1625         goto error;
1626     }
1627     if (unix_handle != -1) close( unix_handle );
1628     return ptr;
1629
1630 error:
1631     if (unix_handle != -1) close( unix_handle );
1632     if (ptr != (void *)-1) munmap( ptr, size );
1633     return NULL;
1634 }
1635
1636
1637 /***********************************************************************
1638  *             FlushViewOfFile   (KERNEL32.@)
1639  * Writes to the disk a byte range within a mapped view of a file
1640  *
1641  * RETURNS
1642  *      TRUE: Success
1643  *      FALSE: Failure
1644  */
1645 BOOL WINAPI FlushViewOfFile(
1646               LPCVOID base, /* [in] Start address of byte range to flush */
1647               DWORD cbFlush /* [in] Number of bytes in range */
1648 ) {
1649     FILE_VIEW *view;
1650     void *addr = ROUND_ADDR( base, page_mask );
1651
1652     TRACE("FlushViewOfFile at %p for %ld bytes\n",
1653                      base, cbFlush );
1654
1655     if (!(view = VIRTUAL_FindView( addr )))
1656     {
1657         SetLastError( ERROR_INVALID_PARAMETER );
1658         return FALSE;
1659     }
1660     if (!cbFlush) cbFlush = view->size;
1661     if (!msync( addr, cbFlush, MS_SYNC )) return TRUE;
1662     SetLastError( ERROR_INVALID_PARAMETER );
1663     return FALSE;
1664 }
1665
1666
1667 /***********************************************************************
1668  *             UnmapViewOfFile   (KERNEL32.@)
1669  * Unmaps a mapped view of a file.
1670  *
1671  * NOTES
1672  *      Should addr be an LPCVOID?
1673  *
1674  * RETURNS
1675  *      TRUE: Success
1676  *      FALSE: Failure
1677  */
1678 BOOL WINAPI UnmapViewOfFile(
1679               LPVOID addr /* [in] Address where mapped view begins */
1680 ) {
1681     FILE_VIEW *view;
1682     void *base = ROUND_ADDR( addr, page_mask );
1683     if (!(view = VIRTUAL_FindView( base )) || (base != view->base))
1684     {
1685         SetLastError( ERROR_INVALID_PARAMETER );
1686         return FALSE;
1687     }
1688     VIRTUAL_DeleteView( view );
1689     return TRUE;
1690 }